System and method of iterative image reconstruction for computed tomography

a computed tomography and image reconstruction technology, applied in the field of diagnostic imaging, can solve the problems of large local changes in the conventional statistical weights, slow down the convergence of the iterative optimization algorithm, and image artifacts, and increase the magnitude of image artifacts

Active Publication Date: 2014-12-18
PURDUE RES FOUND INC +2
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AI Technical Summary

Benefits of technology

The technical effect of this patent is to develop an improved way for reconstructing images through iteration. This approach helps overcome issues with existing methods such as statistical weighting.

Problems solved by technology

The technical problem addressed in this patent is to design a system and method of iterative image reconstruction that improves image quality and reduces image noise by overcoming the drawbacks of conventional statistical weighting techniques.

Method used

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  • System and method of iterative image reconstruction for computed tomography
  • System and method of iterative image reconstruction for computed tomography
  • System and method of iterative image reconstruction for computed tomography

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Embodiment Construction

[0026]The operating environment of embodiments of the invention is described with respect to a sixty-four-slice computed tomography (CT) system. However, it will be appreciated by those skilled in the art that embodiments of the invention are equally applicable for use with other multi-slice configurations. In addition, while embodiments of the invention are described with respect to iterative reconstruction techniques for use with CT systems, one skilled in the art will recognize that the concepts set forth herein are not limited to CT and can be applied to iterative reconstruction techniques used with other imaging modalities in both the medical field and non-medical field, such as, for example, an x-ray system, a PET system, a SPECT system, an MR system, or any combination thereof. Moreover, embodiments of the invention will be described with respect to the detection and conversion of x-rays. However, one skilled in the art will further appreciate that embodiments of the inventio...

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Abstract

A system and method include acquisition of projection data from a scanned object, the set of projection data comprising a plurality of projection measurements. The system and method also include calculation of a set of modified statistical weights from the projection data, wherein a respective modified statistical weight of the set of modified statistical weights comprises a deviation from an inverse variance of a corresponding projection measurement of the projection data. The system and method further include reconstruction of an image of the scanned object using the set of modified statistical weights as coefficients in an iterative reconstruction algorithm.

Description

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Claims

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Application Information

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Owner PURDUE RES FOUND INC
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